It used to be on Thursday but seems like Deej is in the mood for messing with us and it now appears on Wednesday. I would try getting the app for your phone or just check your tablet and computer constantly on these days. For the most part it seems to be later in the day when it pops up (EST). Try following the bungie mail sack group as well and watch to see what people are liking or posting on. Either all that or just random luck lol. Hopefully this helped!